// Test that the function return is (not) converted into a jump to the thunk // when the `-Zfunction-return={keep,thunk-extern}` flag is (not) set. //@ revisions: unset keep thunk-extern keep-thunk-extern thunk-extern-keep //@ assembly-output: emit-asm //@ compile-flags: -O //@ [keep] compile-flags: -Zfunction-return=keep //@ [thunk-extern] compile-flags: -Zfunction-return=thunk-extern //@ [keep-thunk-extern] compile-flags: -Zfunction-return=keep -Zfunction-return=thunk-extern //@ [thunk-extern-keep] compile-flags: -Zfunction-return=thunk-extern -Zfunction-return=keep //@ only-x86_64 //@ ignore-x86_64-apple-darwin Symbol is called `___x86_return_thunk` (Darwin's extra underscore) //@ ignore-sgx Tests incompatible with LVI mitigations #![crate_type = "lib"] // CHECK-LABEL: foo: #[no_mangle] pub unsafe fn foo() { // unset: ret // unset-NOT: jmp __x86_return_thunk // keep: ret // keep-NOT: jmp __x86_return_thunk // thunk-extern: jmp __x86_return_thunk // thunk-extern-NOT: ret // keep-thunk-extern: jmp __x86_return_thunk // keep-thunk-extern-NOT: ret // thunk-extern-keep: ret // thunk-extern-keep-NOT: jmp __x86_return_thunk }